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- Gravitational_anomaly abstract "In theoretical physics, a gravitational anomaly is an example of a gauge anomaly: it is an effect of quantum mechanics–usually a one-loop diagram—that invalidates the general covariance of a theory of general relativity combined with some other fields. The adjective "gravitational" is derived from the symmetry of a gravitational theory, namely from general covariance. It is also known as diffeomorphism anomaly, since general covariance is symmetry under coordinate reparametrization; i.e. diffeomorphism.General covariance is the basis of general relativity, the current theory of gravitation. Moreover, it is necessary for the consistency of any theory of quantum gravity, since it is required in order to cancel unphysical degrees of freedom with a negative norm, namely gravitons polarized along the time direction. Therefore all gravitational anomalies must cancel out. The anomaly usually appears as a Feynman diagram with a chiral fermion running in the loop (a polygon) with n external gravitons attached to the loop where where is the spacetime dimension. Anomalies occur only in even spacetime dimensions. However, anomalies can occur in the case of an odd-dimensional spacetime manifold with boundary.".
- Gravitational_anomaly thumbnail Triangle_diagram.svg?width=300.
- Gravitational_anomaly wikiPageID "1372446".
- Gravitational_anomaly wikiPageRevisionID "604228812".
- Gravitational_anomaly hasPhotoCollection Gravitational_anomaly.
- Gravitational_anomaly subject Category:Anomalies_in_physics.
- Gravitational_anomaly subject Category:Quantum_gravity.
- Gravitational_anomaly type Abnormality114501726.
- Gravitational_anomaly type Abstraction100002137.
- Gravitational_anomaly type AnomaliesInPhysics.
- Gravitational_anomaly type Anomaly114505821.
- Gravitational_anomaly type Attribute100024264.
- Gravitational_anomaly type Condition113920835.
- Gravitational_anomaly type PhysicalCondition114034177.
- Gravitational_anomaly type State100024720.
- Gravitational_anomaly comment "In theoretical physics, a gravitational anomaly is an example of a gauge anomaly: it is an effect of quantum mechanics–usually a one-loop diagram—that invalidates the general covariance of a theory of general relativity combined with some other fields. The adjective "gravitational" is derived from the symmetry of a gravitational theory, namely from general covariance. It is also known as diffeomorphism anomaly, since general covariance is symmetry under coordinate reparametrization; i.e.".
- Gravitational_anomaly label "Gravitational anomaly".
- Gravitational_anomaly sameAs 중력_변칙.
- Gravitational_anomaly sameAs m.04xkpv.
- Gravitational_anomaly sameAs Q867441.
- Gravitational_anomaly sameAs Q867441.
- Gravitational_anomaly sameAs Gravitational_anomaly.
- Gravitational_anomaly wasDerivedFrom Gravitational_anomaly?oldid=604228812.
- Gravitational_anomaly depiction Triangle_diagram.svg.
- Gravitational_anomaly isPrimaryTopicOf Gravitational_anomaly.
